Nokia 3 - Wifi Calling - 4G Battery drain

user1519809336863

I represent a housing association is South West England - we have deployed around 38 Nokia 3's running Android 7.

We’ve
discovered an issue with Nokia 3 phones relating to battery life, that to us,
seems like a bug.

We’ve
been using the phones with 4G and in particular Wifi calling – as EE support
this on the Nokia 3.

After
deployment, we started getting a lot of reports of poor battery life that
didn’t seem consistent with our testing – people were reporting batteries
lasting less than 12 hours. So after a bit of testing we found:

-If
4G/Wifi/Wifi Calling is on and connected to a Wifi access point – battery seems
to last a day or so

-If
4G is on, Wifi on but not connected and Wifi calling is off – battery lasts as
above.

-If
4G is on, wifi is on but not connected and wifi calling is enabled – battery
lasts 10-12 hours

-If
we switch to 3G, wifi on but not connected with wifi calling enabled – battery
life if restored to a day or so.

As
we need Wifi calling, the only solution seems to be that we disable 4G.
Otherwise people have to keep enabling and disabling Wifi calling when 4G is
on.

This
would seem a workaround, but people are finding poor call quality in one of our
main buildings on wifi calling where there is no mobile signal.

EE
said that we were getting poor wifi calling quality because we had disabled 4G
and enabled 3G (which didn’t make a lot of sense to me, as the point of wifi
calling is presumably where there is no 3G or 4G)

This issue seems to be consistent across all the
Nokia 3 phones. Is this performance expected?